A MAC address is a unique character string, and since it identifies a specific physical device — one individual NIC — the MAC address, by convention, never changes for the life of the NIC.
一个MAC地址是一个独一无二的字符串。由于它标识一个独特的物理设备——一个唯一的网卡——MAC地址，按照约定，在网卡中将永不会改变。
By bringing Mac, a character of true and now enduring tragicomic greatness, back to life, he provides ample compensation.
他把麦克这个真实伟大、悲喜交集的人物描绘得栩栩如生，足以补偿。
For about the same monthly payment as their old loan, Freddie Mac said, they could shave about $70, 000 in interest over the life of the loan with a shorter 20-year mortgage.
FreddieMac说，因为月付金额与旧贷款相同，他们能在较短期的20年期贷款周期中削减利息约七万美金。
49pm - 14 hour battery life, both PC and Mac.
49pm14小时的电池续航力，PC和Mac 都能相容。
Simulation result shows that as the life time of MAC address being set appropriately, S-DCF algorithm can accurately estimate the number of competing nodes in the different networks.
仿真结果表明，当MAC地址生存期取值合理时，S -DCF算法能在不同网络环境下较准确地估计网络中的竞争节点数目。
WSN is formed by lots of cheap sensor nodes, each one of them energy extremely limited. In the design of MAC protocol, saving energy and prolonging life cycle are the primary goal.
无线传感器网络节点数量大、单个节点能量极其有限，在设计MAC协议时有效节约能量，延长网络生命周期成为首要目标。
WSN is formed by lots of cheap sensor nodes, each one of them energy extremely limited. In the design of MAC protocol, saving energy and prolonging life cycle are the primary goal.
无线传感器网络节点数量大、单个节点能量极其有限，在设计MAC协议时有效节约能量，延长网络生命周期成为首要目标。
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